Interdental brush



FIG. 1 is a perspective view of an interdental brush, showing my new design;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a right side view of FIG. 1;

FIG. 4 is a top end view of FIG. 1; and,

FIG. 5 is a bottom end view of FIG. 1.

The rear view of FIG. 1 is a mirror image of FIG. 2 and the left side of FIG. 1 is a mirror image of FIG. 3. 

The ornamental design for an interdental brush, as shown and described. 